The New York Times says you should get a second opinion before a cavity filling, since how often “needs drilling” depends on the dentist

Not sure you need that cavity filled? Dentists have different views on drilling. Here is when to ask questions or seek a second opinion.
Los Angeles Times

What to Know About Dental Fillings: Materials, Techniques, and Long-Term Results

Composite fillings show over 80% success in young children treated under general anesthesia. Bulk-fill methods reduce procedure time by 60% while maintaining high restoration quality. Material ...